Desiccation effects on germination and vigor of King palm seeds

Martins, Cibele Chalita; Bovi, Marilene Leão Alves; Nakagawa, João

doi:10.1590/s0102-05362003000100019

Cited by 26 publications

(21 citation statements)

References 11 publications

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“…When fresh recalcitrant seeds begin to dry, their viability is first slightly reduced as moisture is lost, but begins to decline considerably at a certain moisture level termed the critical moisture content or lowest safe moisture content Wesley-Smith et al, 2001). The value of 50.28% recorded in the present study as the critical moisture content is higher than those reported for many other recalcitrant tree seeds such as Garcinia kola seeds (Agyili et al, 2007;Asomaning et al, 2011) and Corypha umbraculifera seeds (Viji et al, 2013), but similar to values which have been reported for Archontophoenix alexandrae (Martins et al, 2003) and Euterpe edulis (Panza et al, 2007) seeds. This is an indication that the critical moisture content of recalcitrant seeds varies greatly among species.…”

Section: Discussionsupporting

confidence: 78%

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Germination of <i>Cola anomala</i> (K. Shum.) Shott and Endl seeds: effects of provenance, substrate and dehydration

Kanmegne¹,

Anouma²,

Fotso³

et al. 2015

Int. J. Bio. Chem. Sci

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As a step in the process of Cola anomala domestication, investigations were undertaken on germination requirements and desiccation tolerance of its seeds. Three seed provenances (Bamenda, Bayangam and Dschang), three substrates (forest top soil, river sand and a mixture of forest top soil and river sand) and two photoperiods (12 hours/day and, continuous darkness) were investigated for their effects on seed germination. To evaluate their desiccation tolerance, fresh seeds were dried at room temperature for 16 days during which seed moisture content, seed germination percentage and electrical conductivity of seed leachate were monitored at two-day intervals. Results showed that germination percentages were significantly (P < 0.05) higher both on forest top soil alone (86.04 ± 4.8%), and on a mixture of forest top soil and river sand (83.56 ± 4.5%), than on river sand alone (69.96 ± 4.7%). Seeds from Bamenda showed a higher germination percentage (91.4 ± 4.7%) than those from either Bayangam (77.36 ± 4.7%) or Dschang (70.8 ± 4.8%). The desiccation tolerance test revealed that as response to drying, the mean germination percentage was first slightly reduced as moisture was lost, then declined considerably at moisture content below 50.28%. Total germination failure was observed when seed moisture reached 32.24%. Electrical conductivity of seed leachate exhibited a strong correlation with loss of viability as well as with desiccation. It is concluded that there is a provenance-related variation in C. anomala seed germination. The best substrate for germination is forest top soil supplemented or not with river sand in a 1/1 (v/v) ratio. C. anomala seeds are desiccation-sensitive and their storage behaviour is recalcitrant.

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Section: Discussionsupporting

confidence: 78%

“…This is however applicable to orthodox seeds which go through the process of maturation drying. Recalcitrant seeds on the contrary do not undergo maturation drying and even after shedding from the mother plant they have high moisture content ranging from 30 to 70%, leading to their wetness (Martins et al, 2003;MSBP, 2005).…”

Section: Discussionmentioning

confidence: 99%

Germination of <i>Cola anomala</i> (K. Shum.) Shott and Endl seeds: effects of provenance, substrate and dehydration

Kanmegne¹,

Anouma²,

Fotso³

et al. 2015

Int. J. Bio. Chem. Sci

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“…Frutos de A. alexandrae, com coloração do epicarpo vermelho-brilhante e em estádio inicial de dispersão (BOVI, 1998) (MARTINS et al, 2003).…”

Section: Methodsunclassified

“…A palmeira-real australiana é propagada exclusivamente por meio de sementes, as quais são classificadas como recalcitrantes, não podendo ser armazenadas em temperaturas baixas, e perdem a viabilidade se desidratadas em teores de água inferiores a 15% (MARTINS et al, 2003). Os procedimentos para a germinação da palmeira-real-australiana, assim como da quase totalidade das espécies florestais, ainda não estão padronizados pelas Regras para Análise de Sementes -RAS (BRASIL, 2009), publicação que normatiza a metodologia desse teste quanto às recomendações de temperaturas, tipos e intensidade de umedecimento dos substratos, critérios de avaliação, entre outras.…”

Section: Introductionunclassified

Tipos de substratos para germinação de sementes de palmeira- real-australiana (Archontophoenix alexandrae H. Wendl. & Drude)

Martins

Caldas²,

Machado

et al. 2011

Rev. Árvore

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“…This species has a simple trunk 8 to 10 m high and 18 cm in diameter, cylindrical stipe, 2-3 m long pinnate leaves, white-colored, branched inflorescences when young and reddish spherical fruits (LORENZI, 2004). A. cunninghamiana became an option for heart of palm production as a replacement for the predatory exploitation of native species, especially Euterpe edulis (MARTINS et al, 2003). However, the introduction of the King Palm has led to its invasion of remaining Atlantic Forest fragments.…”

Section: Introductionmentioning

confidence: 99%

Germination of Archontophoenix cunninghamiana (Australian king palm) seeds based on different temperatures and substrates

Luz

Tavares

Pivetta

2017

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Archontophoenix cunninghamiana or Australian King Palm, is a very popular ornamental palm in Brazil. Although A. cunninghamiana is propagated by seeds, few studies have reported on seed germination of this species. Therefore, this study aimed to evaluate the effect of different temperatures and substrates on the germination of A. cunninghamiana seeds. To carry out the temperature experiment, constant temperatures of 20, 25, 30 or 35 °C and alternating temperatures of 20/30 °C or 25/35 °C were used with four replications of 25 seeds each. For the substrate experiment, sand, vermiculite, and sphagnum moss were used with 7 replicates of 25 seeds per treatment in a completely randomized design. All temperatures, except 35 °C, favored the germination of A. cunninghamiana seeds (60%). Vermiculite was determined to be best suited for the germination of A. cunninghamiana seeds. Overall, the germination of A. cunninghamiana seeds is slow and uneven, in turn allowing for a longer period of germination. Keywords: Archontophoenix cunninghamiana, diaspore, germination index, Palmae. RESUMO Germinação de sementes de Archontophoenix cunninghamiana (Palmeira real australiana)em diferentes temperaturas e substratos Archontophoenix cunninghamiana ou palmeira real australiana, é uma palmeira ornamental muito popular no Brasil. Embora A. cunninghamiana seja propagada por sementes, poucos estudos têm relatado a germinação de sementes da espécie. Portanto, este estudo teve como objetivo avaliar o efeito de diferentes temperaturas e substratos na germinação de sementes de A. cunninghamiana. Para o experimento de temperatura foram utilizadas as temperaturas constantes de 20, 25, 30 ou 35 °C e temperaturas alternadas de 20/30 °C ou 25/35 °C com quatro repetições de 25 sementes cada. Para a experiência do substrato, foram utilizados areia, vermiculita e musgo esfagno com 7 repetições de 25 sementes por tratamento, em delineamento inteiramente casualizado. Todas as temperaturas, exceto 35 °C, favoreceram a germinação de sementes de A. cunninghamiana (60%). A vermiculita foi o substrato mais adequado para a germinação de sementes de A. cunninghamiana. Em geral, a germinação de sementes de A. cunninghamiana foi lenta e desigual, por sua vez, permitindo um período mais longo de germinação. Palavras-chave: Archontophoenix cunninghamiana, diasporo, índice de germinação, Palmae.

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Desiccation effects on germination and vigor of King palm seeds

Cited by 26 publications

References 11 publications

Germination of <i>Cola anomala</i> (K. Shum.) Shott and Endl seeds: effects of provenance, substrate and dehydration

Germination of <i>Cola anomala</i> (K. Shum.) Shott and Endl seeds: effects of provenance, substrate and dehydration

Tipos de substratos para germinação de sementes de palmeira- real-australiana (Archontophoenix alexandrae H. Wendl. & Drude)

Germination of Archontophoenix cunninghamiana (Australian king palm) seeds based on different temperatures and substrates

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